Examples with IntExpr com.microsoft.z3.IntExpr used on opensource projects

Example 6 with IntExpr

use of com.microsoft.z3.IntExpr in project spoon by INRIA.

the class CommonUtils method getTargetValue.

/**
 * Gets target expression value by going from left to right.
 * For example, 'a.b' is calculated as follows: memory[T2.b][memory[T1.a][a]]
 */
public static IntExpr getTargetValue(Context context, Map<CtReference, Expr> variablesMap, Memory memory, CtExpression<?> target) {
    Deque<CtExpression> targets = new ArrayDeque<>();
    while (target instanceof CtTargetedExpression) {
        targets.addFirst(target);
        target = ((CtTargetedExpression) target).getTarget();
    }
    targets.addFirst(target);
    // Traverse all targets left to right
    IntExpr targetValue = null;
    for (CtExpression t : targets) {
        if (t instanceof CtFieldRead) {
            targetValue = (IntExpr) memory.read(((CtFieldRead) t).getVariable(), targetValue);
        } else if (t instanceof CtArrayRead) {
            CtArrayRead arrayRead = (CtArrayRead) t;
            CtExpression index = arrayRead.getIndexExpression();
            Expr arrayIndex = (Expr) index.getMetadata("value");
            targetValue = (IntExpr) memory.readArray((CtArrayTypeReference) arrayRead.getTarget().getType(), targetValue, arrayIndex);
        } else if (t instanceof CtVariableRead) {
            targetValue = (IntExpr) variablesMap.get(((CtVariableRead) t).getVariable());
        } else if (t instanceof CtTypeAccess) {
            targetValue = (IntExpr) variablesMap.get(TypeUtils.getActualType(t));
            if (targetValue == null) {
                targetValue = (IntExpr) context.mkFreshConst("", context.getIntSort());
                variablesMap.put(TypeUtils.getActualType(t), targetValue);
            }
        } else if (t instanceof CtThisAccess) {
            targetValue = context.mkInt(Memory.thisPointer());
        } else {
            // Impure functions and other unknown stuff
            targetValue = (IntExpr) context.mkFreshConst("", context.getIntSort());
        }
    }
    return targetValue;
}